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Key Concepts of Virtual Private Networks

Virtual Private Networks claim to solveAuthentication are three aspects most
majority of the security problems faceddiscussed with respect to a VPN
by the enterprises. Most of the issuestechnology. Protecting the Privacy of
were related to secure data transferinformation requires some sort of
over the public internet. The internetsencryption. Private Key encryption and
greatest asset is ubiquity and opennessPublic Key encryption methods are the
but this is its greatest weakness asmost common methods available presently.
well. VPN seems to have been a solutionPrivate key encryption is a bit
to the weakness.problematic as the key has to be sent
Many technologies have come up and claimover the internet. Public key systems
to be VPN technologies: SSL VPN, MPLSprovide communication between unsecured
VPN to name some. Some basic questionssystems and even provide means to
are how do we define VPN ? Why do weexchange of private keys. The
need a VPN and what are the technologiesdisadvantage of a public key encryption
used in deploying VPN?system is that it requires more
Organizations in the past deployedcomputation. A balance between the two
private networks like LAN or WAN foris the best solution. The DES secret
their mission critical applications. Akey algorithm and Diffie-Hellman public
performance predictable and securekey algorithm can be used in
infrastructure was the end result. Aconjunction. The DES can be used to
growing number of businesses cannotencrypt the traffic and the
afford setting up a private network andDiffie-Hellman to produce the secret
existing networks had to reach out tokey.
customers to gain a market edge. This isInformation should not be altered during
the area where the internet scores itsthe transit over the internet. Integrity
points. Networking basics still presentis ensured using one-way hash function
a few bottlenecks. Bandwidthor Message authentication codes (MAC) or
constraints, security problems due toeven digital signatures.
increased exposure, threats likeAuthentication is ensuring the identity
spoofing, session hijacking, sniffingof the opposite party in a communication
and man-in-the-middle attacks haveprocess. Password protection or digital
exposed data in transit.signatures (X.509 standard) are an ideal
Considering business factors and themethod. The process is a complex system
risk factors and it may frighten you. Aof key generation, certification,
new technology has brought the risksrevocation and management. All this is a
down for data transit on the internet.part of a PKI: public key
Virtual Private Networks as it is calledinfrastructure.
follows encryption and tunneling for theProtocols
secure transfer of data between twoSeparate technologies can be used to
ends. It extends trust relationshipsprovide confidentiality integrity and
across the cheaper public network.authentication. Three widely used VPN
Security and predictable performancessecurity protocols are.
are a part of this technology.- IPSec Protocol
Its uses are- Tunneling protocols (PPTP:Point to
- Remote users and tele-workersPoint tunneling protocol, L2TP: Layer2
connecting to their corporate serverTunneling protocol )
securely.- Socks5
- Linking the offices in an enterpriseServices
networkMany managed VPN services offer Quality
- Organizations making their e-commerceof Service guarantees, which can be an
solutions better by extendingexcellent choice for site-to-site
infrastructure to include partners,connectivity. VPN is an end to end
suppliers and customers.communication solution and it cannot
Variety of Technologieseffect the performance of the middle
VPN technology has been around fornetwork and components. This is the
quite sometime. Present and future ofreason for the QoS guarantees which are
VPN depend on emerging standards thatbasically a marketing gimmick by the
have made it secure and reliable. VPN isISP. Each ISP has control over its
deployed and marketed more every passingnetwork only and not the entire internet
day. Some products are emergingwhich makes the QoS flawed. Mission
standards while the old are for specificcritical performances are still to be
requirements. Each product andrealized but security has to an extent
technology has it respective strengthsbeen mitigated.
and weakness. Choosing the technologyAuthor:vpntools.com, presents a secure
depends on how the problems arealternative to the problems faced on the
addressed and what will be the futureinternet. Networking Basics , Future
trends of the present technology.of VPN, etc ..... are a few of the
Security is the present focus of mosttopics that could interest you.
VPN technologies.Completer end to end security is
Confidentiality, Integrity andachievable and you could find it here.



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